Means for preventing backlash in rounding and backing machines



J...v26,1s 26.A A1,570,840 A. v. JOHNSON A MEANS FOR PREVENTING BACKLASH IN ROUNDING AND BACKING MACHlNES Filed' Dec. 10, 1920 Y, w r/// INVENTDR xel V55/fiar Lvmsa/z CII Patented Jan. 26, 1926.

UNITED STATES PATeNT-o-Frice AXEL VIKTOR JOHNSON, orY BROOKLYN," NEW YORK, AssIGNOR To `marin Goat;` COM- PANY, OF BROOKLYN, New AYORK, A CORPORATION OF NEW Yoan.y

MEANS Fon BneveNTINe BACKLASH IN ROUNDING AND BACKING MacHINEs.

i 'application filed December io, 1920K. serial No. 429,665.

To all :whom t may concern v Be it known that I, AXEL VrlrfronJoHN- soN, a subject of the King of Sweden, Vbut who have declared myintention of becoming `a citizen ofthe United States, residing at Brooklyn, county and State vof New York,

' bound book-s,"periodicals, and .the like, the

machinev ,whichA is inpractica'l-universal use `for thisfpurposel is known Vas :the Grawley machine, which is Yshown and. described :in-

have made a certain #new and useful Invert tion `in Means Afor Preventing Backlash .inl

Rounding and Backing Machines, yof which the following is a specification. I ,I

Thisinvention relates `tomeans em loyed vin connectionwith what is known 1n :the `art as the Crawley machine for-rounding and backing books for `preventing black lash, re-

r bound, or imperfect operation of the sweep e jaws thereof in the normal operation of the machine.

The object of means for insuring a proper positioning of` the sweep vjaws relative tothe book fed there between on each forwardY position of the sweep. f A ;l f

A further object. of the, invention is to provide. a counter-balance arrangement which secures theresultssought.

A further objeotiof theinvention isto provide an arrangement ofy the character set forth which is simple in construction, ef-

ficient in operation, and whichmay beformed as a part of a new machine at little additional expense, or may be applied to machines already in existence, at but little additional expense.

Further objects ofthe invention will appear more fully hereinafter. l

The invention consists substantizuy in the construction, combination, location, and relative arrangement of parts, all as will be more fully hereinafter set forth, as shown by the accompanying drawing,.and finally pointed out in the appendedclaims.

Referring to the drawing,-

Fig. l is a view in elevation, largely diagrammatic, and partially in section, of the sweep and sweep actuating mechanism of ya standard form of Crawley rounding and backing machine. i

Fig. 2 is a detached sectional view show` ing means employed in accordance with my invention for perfecting the counter-balance.

Fig. 3 is a view in perspective of a book which has been rounded and backed acthe invention .is-Kto provide cordancek with thenormal Operation. ofthe machine. e

The same part is designated thesame reference numeralv wherever itvv occurs vthroughoutftheseveral views'.4`

. In t-he industryfor .rounding andbacking vdetail in United States Letters Patent No. i

372,128, Idated October 25, 18,87, yandissued to'E. Crawley. For the .perfect and satisits ,initial and exact position for new V,work without reboundorbacklash. i

parts` for 'the sweep y'and sweep aws soonbecome worn,due kprobably to excessive vand unnecessary strain on these parts' when the sweep is overbalanced as it moves back and a slam and rebound when the sweep returns,

and' as a consequence the. joints of books are not uniform. Towovercome'vthis vserious de` effect. VWhen the parts are worn, however,

Experience has shown thatgthe (.)p'erating forthfto perform its designedfunctions- The f result of this wear `and looseness of parts is the spring has a tendency to push or pull, as

the case may be, the. sweep away from the stop, which is likewise undesirable and detrimental to the satisfactory operation of the v machine. i

I `have found that by applying a counter weight to the sweep, I am enabled to take up loose motion in all the connected operating parts so that the sweep always returns tothe stopin front of the machine, thereby insuring perfect `joints and obliteratingl all slam. It should furtherbenoted, that the counterweight also takes up excessive and unnecessary strain on the operating parts when the sweep overbalances and,V thereby, lto a large extent, prevents excessive wearl and early deterioration of a rather complicated and expensive machine.

In practicing my invention I have found -f itkfeasible and very satisfactory to apply the counterweight to the sweep in the manner clearly indicated by the accompanying drawing, wherein the sweep is represented at l0 and to which is attached by any suitable means, as an eye 11., a flexible or other suitable connection 12, having attached thereto a proper counterweight 13. The flexible connection may pass over a pulley 14e properly supported by a bracket or frame 15.

As is also indicated Vby the drawing, the size of the joint 16 of the book 17 is controlled by the position of the sweep 10, the sweep jaws 18, the back stop 19, and the sweep adjusting` and stop screw 20, which latter may be regulated by an operators handwheel 21 to the proper position for stopping the sweep at desired points for insuring perfeet and uniform joints. It is apparent from this arrangement that the sweep will always be definitely positioned when the sweep jaws fasten down on a book in preparation for rounding and backing, as is well understood inthe art, and will therefore not be here redescribed. It sho-uld be noted, however, that the sweep overbalances as it moves away from its initial position, as shown in Fig. 1, for example, and which operation is effected by cam l), through the instrumentalities of the connected cam roller E, the operating toggles K and levers F, and G, which form herein no part of my invention other than Y for carrying out the same as described above.

rIhis overbalancing causes excessive strain and wear on the several connected operating parts, with the result of the slam action heretofore noted, and the inaccurate positioning of the sweep and sweep jaws. The immediate, unexpected, and beneficial results obtained by vthe application of my invention therefore reside largely in materially reducing wear of the operating parts and in positively and accurately locating the sweep and sweep jaws. In this manner the application of my invention materially prolongs the life and usefulness of the machine, and at the same time produces more uniform and better joints as has been explained above.

Having now set forth the objectsV and nature of my invention, and a structure embodying,l the principles thereof, what I claim as new and useful and of my own invention and desire to secure by Letters Patentis 1. In a machine for rounding and backing books, the combination of means for holding the books to be rounded and backed, and a weight flexibly connected to said holding means for preventing back lash of said holding means.

2. In a machine for rounding and backing books, the combination of means `for holding the books to be rounded and backed and means for preventing back lash of said holding means, said back lash preventing means comprising a counterweight applied to said holding means.

3. In a machine for rounding and backing books, the combination of a cam-operated sweep and a counterweig'ht attached to said sweep for positively positioning said sweepy l. In a machine for rounding and backing books, the combination of a cam operated sweep and a counterweight flexibly attached to said sweep to thereby positively influence said sweep in one direction.

5. In a machine for rounding and backing books, a cam operated sweep, a pulley, a flexible connection passing over said pulley, and a weight .connected with said sweep by said flexible connection for modifying the movements thereof. 1

In testimony whereof I have hereunto set my hand on this 4th day of December A. D., 1920.

AXEL VIKTOR JOHNSON. 

